Improvement in paper-pulp machines



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BURGHARDT & BURGHARDT. Improvement in Paper-Pulp Machines.

No, 128,788, 'PatentedJuly 9,1872.

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BURGHARDT & BUR GHARDT.

Improvement in Paper-Pulp Machines.

N0.128,788-, Patented my 9, 1872.

UNITED STATES PATENT QFFIGE.

JOHN M. BURGHARDT, or GREAT BARRINGTON, AND FREDERICK BURGHARDT, oroUR'ris'vILLE, MASSACHUSETTS.

IMPROVEMENT IN PAPER-PULP MACHINES.

Specification forming part of Letters Patent No. 128,788, dated July 9,1872.

Specification describing a new and useful Improvement in Paper-PulpMachines, invented by JOHN M. BURGHARDT, of Great Bar- The object ofthis invention is to provide improved means for reducing wood to pulpfor the manufacture of paper; and it consists in the construction,arrangement, and combination of parts, hereinafter described.

In the accompanying drawing, Figure 1, Sheet I, represents a frontelevation of the machine. Fig. 2 is a top or plan view. Fig. 3, SheetII, is a sectional side elevation. Fig. 4, SheetII, is a view looking inthe direction indicated by the arrow in Fig. 2, showing the gear-wheelwhich drives the followers.

Similar letters of reference indicate corresponding parts.

A is a bed-frame, to the opposite sides of which are attached theupright posts B B. G is a revolving grinding emery wheel hung on thehorizontal shaft I), supported in boxes on the two uprights B B. Thedriving-power is applied to this shaft D by means of a belt, or in anyconvenient and suitable manner. E represents the beds, four in number,on which the blocks of wood F rest in being cut or reduced to pulp.These beds are arranged on each side of the grinding-wheel in pairs, oneover the other, as seen in Fig. 1, and the wood is fed up to the wheelby a sliding follower, G, on each bed. The feeding is done by means ofthe endless chains H on therevolving chain-wheels I. The position of thewood block in relation to the grinding-wheel is seen in Fig. 3, SheetII. The arrangement of the beds E is such that they are parallel withlines radiating from the center of the grinding-wheel. J represents awormgear, the shaft of which is revolved by the belt K fromgrinding-wheel shaft D. The wood blocks must, of course, be fed up tothe grinding-wheel at a very slow rate of speed, and the speed of thewheel is reduced mainly by this worm-gear J but is further reduced bymeans of the pinion L and spur-wheels m m, which latter revolve thepulley-shafts n n, from which motion is communicated to thepulley-shafts O O on each side of the grindingwheel. P is a pinion onthe end of each of these four shafts O, which pinions mesh with thespur-wheels Q, which wheels are on the ends of the shafts of the twoinner chainwheels I on each side of the grinding-wheel. The chains Hsimply pass around the outer wheels I. The followers G are connectedwith the chains by means of the clamps R. The followers are thus forcedagainst the blocks of wood, and the latter are forced up to the sides ofthe grinding-wheel with aslow, steady, and uniform motion. When thegrinding of a block has been completed the small pinions I? are thrownout of gear with the wheels Q by means of the slides S, (see Fig.

4,) in which the ends of the shafts O revolve. These slides are held tothe bed-frames T by meansof set-screws U. V is the curb or casing of thegrindingwheel, in which apertures are made on each side of the wheel toadmit the blocks to be reduced. This casin g is made of cast-iron andtightly incloses the grinding portion of the wheel above the bed-frameA.

It will be seen from the drawing that each follower is provided with twochains for moving it or feeding up the block, the chains being arrangedas seen in Figs. 1 and 2.

WV represents the stands upon the bed-piece, which support the shafts ofthe chain-wheels.

We do not limit or confine ourselves to the precise form or arrangementof the parts described, as variations may be made wiihout departing fromour invention.

Having thus described our invention, we claim as new and desire tosecure by Letters Patent 1. The combination of the worm-gear J, wheels Land M M, shaftsN N and O O, and pinions P with the followers G, chainsH, chain-wheels I, and slides S, as shown and described.

2. The followers G, chains H, and chainwheels I, arranged to operate asand for the purposes described.

3. The slides S, in combination with the followers G and chains H,substantially as and for the purposes described.

J. M. BURGHARDT. FREDERICK BURGHARDT. Witnesses:

N. WELLS SEGUERIE, B. PALMER.

